23920279 has 2 divisors, whose sum is σ = 23920280. Its totient is φ = 23920278.

The previous prime is 23920277. The next prime is 23920289. The reversal of 23920279 is 97202932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23920279 - 2¹ = 23920277 is a prime.

Together with 23920277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23920277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11960139 + 11960140.

It is an arithmetic number, because the mean of its divisors is an integer number (11960140).

Almost surely, 2^23920279 is an apocalyptic number.

23920279 is a deficient number, since it is larger than the sum of its proper divisors (1).

23920279 is an equidigital number, since it uses as much as digits as its factorization.

23920279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 23920279 is about 4890.8362270679. The cubic root of 23920279 is about 288.1301776149.

The spelling of 23920279 in words is "twenty-three million, nine hundred twenty thousand, two hundred seventy-nine".